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/*
* This file is part of mpv.
*
* mpv is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* mpv is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include <sys/types.h>
#include <libswscale/swscale.h>
#include "config.h"
#include "common/msg.h"
#include "options/options.h"
#include "video/img_format.h"
#include "video/mp_image.h"
#include "vf.h"
#include "video/fmt-conversion.h"
#include "video/sws_utils.h"
#include "video/csputils.h"
#include "video/out/vo.h"
#include "options/m_option.h"
#include "vf_lavfi.h"
static struct vf_priv_s {
int w, h;
int cfg_w, cfg_h;
int v_chr_drop;
double param[2];
struct mp_sws_context *sws;
int noup;
int accurate_rnd;
int warn;
} const vf_priv_dflt = {
0, 0,
-1, -1,
0,
{SWS_PARAM_DEFAULT, SWS_PARAM_DEFAULT},
.warn = 1,
};
static int find_best_out(vf_instance_t *vf, int in_format)
{
int best = 0;
for (int out_format = IMGFMT_START; out_format < IMGFMT_END; out_format++) {
if (!vf_next_query_format(vf, out_format))
continue;
if (sws_isSupportedOutput(imgfmt2pixfmt(out_format)) < 1)
continue;
if (best) {
int candidate = mp_imgfmt_select_best(best, out_format, in_format);
if (candidate)
best = candidate;
} else {
best = out_format;
}
}
return best;
}
static int reconfig(struct vf_instance *vf, struct mp_image_params *in,
struct mp_image_params *out)
{
int width = in->w, height = in->h;
int d_width, d_height;
mp_image_params_get_dsize(in, &d_width, &d_height);
unsigned int best = find_best_out(vf, in->imgfmt);
int round_w = 0, round_h = 0;
if (!best) {
MP_WARN(vf, "no supported output format found\n");
return -1;
}
vf->next->query_format(vf->next, best);
vf->priv->w = vf->priv->cfg_w;
vf->priv->h = vf->priv->cfg_h;
if (vf->priv->w <= -8) {
vf->priv->w += 8;
round_w = 1;
}
if (vf->priv->h <= -8) {
vf->priv->h += 8;
round_h = 1;
}
if (vf->priv->w < -3 || vf->priv->h < -3 ||
(vf->priv->w < -1 && vf->priv->h < -1))
{
MP_ERR(vf, "invalid parameters\n");
return -1;
}
if (vf->priv->w == -1)
vf->priv->w = width;
if (vf->priv->w == 0)
vf->priv->w = d_width;
if (vf->priv->h == -1)
vf->priv->h = height;
if (vf->priv->h == 0)
vf->priv->h = d_height;
if (vf->priv->w == -3)
vf->priv->w = vf->priv->h * width / height;
if (vf->priv->w == -2)
vf->priv->w = vf->priv->h * d_width / d_height;
if (vf->priv->h == -3)
vf->priv->h = vf->priv->w * height / width;
if (vf->priv->h == -2)
vf->priv->h = vf->priv->w * d_height / d_width;
if (round_w)
vf->priv->w = ((vf->priv->w + 8) / 16) * 16;
if (round_h)
vf->priv->h = ((vf->priv->h + 8) / 16) * 16;
// check for upscaling, now that all parameters had been applied
if (vf->priv->noup) {
if ((vf->priv->w > width) + (vf->priv->h > height) >= vf->priv->noup) {
vf->priv->w = width;
vf->priv->h = height;
}
}
MP_DBG(vf, "scaling %dx%d to %dx%d\n", width, height, vf->priv->w, vf->priv->h);
// Compute new d_width and d_height, preserving aspect
// while ensuring that both are >= output size in pixels.
if (vf->priv->h * d_width > vf->priv->w * d_height) {
d_width = vf->priv->h * d_width / d_height;
d_height = vf->priv->h;
} else {
d_height = vf->priv->w * d_height / d_width;
d_width = vf->priv->w;
}
*out = *in;
out->w = vf->priv->w;
out->h = vf->priv->h;
mp_image_params_set_dsize(out, d_width, d_height);
out->imgfmt = best;
// Second-guess what libswscale is going to output and what not.
// It depends what libswscale supports for in/output, and what makes sense.
struct mp_imgfmt_desc s_fmt = mp_imgfmt_get_desc(in->imgfmt);
struct mp_imgfmt_desc d_fmt = mp_imgfmt_get_desc(out->imgfmt);
// keep colorspace settings if the data stays in yuv
if (!(s_fmt.flags & MP_IMGFLAG_YUV) || !(d_fmt.flags & MP_IMGFLAG_YUV)) {
out->color.space = MP_CSP_AUTO;
out->color.levels = MP_CSP_LEVELS_AUTO;
}
mp_image_params_guess_csp(out);
mp_sws_set_from_cmdline(vf->priv->sws, vf->chain->opts->vo->sws_opts);
vf->priv->sws->flags |= vf->priv->v_chr_drop << SWS_SRC_V_CHR_DROP_SHIFT;
vf->priv->sws->flags |= vf->priv->accurate_rnd * SWS_ACCURATE_RND;
vf->priv->sws->src = *in;
vf->priv->sws->dst = *out;
if (mp_sws_reinit(vf->priv->sws) < 0) {
// error...
MP_WARN(vf, "Couldn't init libswscale for this setup\n");
return -1;
}
return 0;
}
static struct mp_image *filter(struct vf_instance *vf, struct mp_image *mpi)
{
struct mp_image *dmpi = vf_alloc_out_image(vf);
if (!dmpi)
return NULL;
mp_image_copy_attributes(dmpi, mpi);
mp_sws_scale(vf->priv->sws, dmpi, mpi);
talloc_free(mpi);
return dmpi;
}
static int query_format(struct vf_instance *vf, unsigned int fmt)
{
if (IMGFMT_IS_HWACCEL(fmt) || sws_isSupportedInput(imgfmt2pixfmt(fmt)) < 1)
return 0;
return !!find_best_out(vf, fmt);
}
static void uninit(struct vf_instance *vf)
{
}
static int vf_open(vf_instance_t *vf)
{
vf->reconfig = reconfig;
vf->filter = filter;
vf->query_format = query_format;
vf->uninit = uninit;
vf->priv->sws = mp_sws_alloc(vf);
vf->priv->sws->log = vf->log;
vf->priv->sws->params[0] = vf->priv->param[0];
vf->priv->sws->params[1] = vf->priv->param[1];
if (vf->priv->warn)
MP_WARN(vf, "%s", VF_LW_REPLACE);
return 1;
}
#define OPT_BASE_STRUCT struct vf_priv_s
static const m_option_t vf_opts_fields[] = {
OPT_INT("w", cfg_w, M_OPT_MIN, .min = -11),
OPT_INT("h", cfg_h, M_OPT_MIN, .min = -11),
OPT_DOUBLE("param", param[0], M_OPT_RANGE, .min = 0.0, .max = 100.0),
OPT_DOUBLE("param2", param[1], M_OPT_RANGE, .min = 0.0, .max = 100.0),
OPT_INTRANGE("chr-drop", v_chr_drop, 0, 0, 3),
OPT_INTRANGE("noup", noup, 0, 0, 2),
OPT_FLAG("arnd", accurate_rnd, 0),
OPT_FLAG("warn", warn, 0),
{0}
};
const vf_info_t vf_info_scale = {
.description = "software scaling",
.name = "scale",
.open = vf_open,
.priv_size = sizeof(struct vf_priv_s),
.priv_defaults = &vf_priv_dflt,
.options = vf_opts_fields,
};
//===========================================================================//
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